Flat rope or belt.



R. A. HAMMOND.

FLAT ROPE 0B, BELT.

APPLIUATION FILED JAN. ao. 190e.

Patented Aug. 9, 1910.

MM.. i A.

l '.MMf/f 1HE Nmzms Perses co., vusmwsrow. n` c ROBERT A. HAMMOND, OFSANDWICH, MASSACHUSETTS.

FLAT ROPE 0R BELT.

Application filed January 30, 1908.

To all whom it may conce-rn.'

Be it known that I, ROBERT A.. HAMMOND, a citizen of the United States,residing at Sandwich, in the county of Barnstable and State ofMassachusetts, have invented new and useful Improvements in Flat Ropesor Belts, of which the following is a specification.

This invention relates to an improved flat belt or rope, the object ofthe invention being to provide a 'belt which shall be very strong andpossessed of great frictional oapacity and which shall be capable ofbeing used without injury or deterioration in wet places or under water,or when subjected to acid fumes or climatic changes, and which is alsoso constructed that in the manufacture of the same the belt will be flatand not inclined to warp or twist, as hereinafter described.

To this end the belt is preferably formed of two series of longitudinalstrands interwoven with two cross strands, the cross strands extendingentirely across the belt side by side and across each other alternatelyat opposite edges of the belt outside the longitudinal strands, so thatwhile each pick contains two cross strands, these cross strands do notadd to the thickness of the belt more than would a single cross strand,and moreover the belt itself, in its completed form, presents a flatsurface, as a whole, to the periphery of the pulley or pulleys overwhich it runs. It will e evident that the thickness of the belt isreduced by the crossing of the strands at the edges thereof to the leastpossible dimensions consistent with the respective diameters of thelongitudinal and cross strands.

The crossing of the cross strands at the edges of the belt, asdistinguished from structures in which the cross strands cross eachother midway between the edges of the belt, results not only in theproduction of a belt which can be made at and comparatively thin, butalso tends to very much prolong the life of the belt, for the reasonthat the cross strands do not rub and wear upon each other in the mannerin which they do when crossing each other while passing through betweenthe longitudinal strands of the belt.

Preferably the longitudinal and cross strands of my' improved belt aremade of strands com osed of wire, each of the strands consisting oaseries of wires twisted tightly together, these wires being then coveredwith Specification of Letters Patent.

Patented Aug. 9, 1910. serial No. 413,385.

a twisted strand of prepared hemp or other fibrous material which isserved around the same to form an outer elastic covering therefor.

In order to prevent the belt from becoming twisted or warped I prefer toform the strands by winding the covering of the wire cores upon saidcores in the opposite direction to that in which the wires forming thecores are wound or laid.

The invention consists in a belt formed and constructed as hereinafterdescribed and particularly as set forth in the appended claims.

Referring to the drawings: Figure l is a face view of my improved beltshowing the same with two cross strands, said cross strands crossingeach other at opposite edges of the belt alternately. F ig. 2 is asectional elevation taken on line 2-2 of Fig. l.

Like numerals Vrefer to like parts throughout the several views of thedrawings.

In the drawings, Figs. l and 2, 5, 5, 5 are longitudinal strands formingone series and 6, 6, 6 are longitudinal strands forming another seriesof such strands.

7 and 8 are the cross strands. It will be seen that the cross strands 7and 8 lie side by side and are interwoven with the longitudinal strands5, 5 and 6, (i, said strands 7 and 8 crossing each other alternately atopposite edges of the belt, and between these edges it will be notedthat the strands 7 and 8 lie side by side, so that the longitudinalstrands are sepa-rated at most by the single thickness of one of thecross strands at any point in the width of the belt.

The longitudinal strands` 5, 5, 5, it will be noted, extend across andoutside the cross strands on one face. of the belt and all of thelongitudinal strands 6, 6, 6 extend across and outside the cross strands7, 8' on the opposite face of the belt at each pick, said strandsrespectively crossing from one face to the other of said belt betweeneach pick. Thus the cross strands are entirely protected from Wearthroughout the entire width of the belt by the longitudinal strands andthere is no tendency for the cross strands to rub one upon the other attheir crossing point.

The crossing of the cross strands at the edges of the belt also adds tothe resiliency of the belt, so that the same can hug closely to theperiphery of the pulley an such a construction adds greatly to thefrictional capacity of said belt.

In Fi s. l and 2 it will be noted that the longitu inal strands 5, 5 and6, 6 each con sist of a central core 9, the wires twisted or laid oneupon the other, said wires being twisted in a left'hand helical form andbeing covered with marline 10, twisted in a right hand helical form tocover the inner core of wires 9, this form of my invention, therefore,being composed of lon itndinal strands in which the inner core oeachstrand is formed of wires laid around each other in one direction and acovering of marline laid around said wires in the opposite direction.

In addition to the advantages hereinbefore set forth derived from theconstruction of my improved flat belt, the constructionof the same issuch, as will be seen by reference particularly to Fig. 2, that there isno possibility of the friction upon the pulley becoming lessened byreason of air becoming confined between the under side of the belt andthe face of the pulley, as is the case oftentimes in broad leatherbelts, but in my improved belt it will be seen that there are lateralspaces as at 1l, 11 (Fig. 2) which extend laterally across the belt and,therefore, prevent any cushioning of air between the belt and the faceof the pulley, thus greatly adding to the efficient frictional con tactof the belt with the pulley.

I-Iaving thus described my invention, what I claim and desire by LettersPatent to secure is:

l. A fiat rope or belt consisting of two sets of v longitudinal strandsand two strands interwoven with said longitudinal strands andA crossingsaid belt alternately in opposite directions and orossin each other atopposite edges of said be t alternately, all of the strands of one ofsaid sets extending across and outside said cross-strands on one face ofsaid rope and all of the strands of the other 0f said sets extendingacross and outside said cross strands on the other face of said rope ateach pick thereof.

2. A flat rope or belt consisting of two sets of longitudinal strandsand tw'o strands` interwoven with said longitudinal strands and crossingsaid belt alternatel in opposite directions and crossing each otiier ato posite edges of said belt alternately, all o the strands of one ofsaid sets extending across and outside said cross strands on one face ofsaid rope and all of the strands of the other of said sets extendingacross and outside said cross strands on the other face of said rope,all of the strands of each of said sets respectively crossing from oneface to .the other of said rope between each pick thereof.

3. A flat rope or belt consisting of two sets of longitudinal strandsand two strands interwoven with said longitudinal strands and crossingsaid belt alternately in opposite directions, extending side by sideentirely across said belt and crossing each other at opposite edges ofsaid belt alternately, all ofthe strands of one of said sets extendingacross and outside said cross strands on onev face of said rope and allof the strands of the other of said sets extending across and outsidesaid cross strands on the other face of said rope at each pick thereof.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

RoBEar A. HAMMoNn.

Witnesses:

CHARLES S. GroonING, FREDERICK E. WILLIAMS.

